"Before I became an author myself, I held an inflated estimate of the number of copies the typical book (bestselling or otherwise) sold. I also thought the author earned more per book than he really does. In my experience, the general public shares the misconceptions I once held. Now for the terrible truth."
I could have written those words myself. But I didn't. Thomas E. Woods, Jr. did. If you are thinking about writing a book, or in the process of writing one, read the piece - then get back to work.